AC Mains

Connect AC power to the IEC socket on the back of the amplifier by locating the IEC connector-end of the AC power cord and inserting it fully into the IEC inlet on the power amplifier module. NOTE: Turn off the AC power switch before connecting AC power.

An AC power cord hook-and-loop tether (retention strap) is provided to mini- mize the risk of the power cord being inadvertently pulled from its connection at the back of the amplifier. To use the tether, pass it through the chassis lance (adjacent the IEC socket) and then capture the AC power cord by loop- ing it in the tether before closing the hook-and-loop strap.

The correct AC line voltage is shown on the serial number label, on the rear panel. Connecting to the wrong line voltage may damage the amplifier or increase the risk of electric shock.

AC Mains Disconnection

Turn the AC power switch to the off position. To remove the AC mains cord, grasp the IEC connector’s plastic body and pull, removing the connector from the socket.

Power Switch

Push in on the top of the rocker switch to apply AC mains power to the pow- ered loudspeaker. Push in on the bottom of the rocker switch to turn the pow- ered loudspeaker off.

When turned on, the blue POWER indicator LED and the red LIMIT (limiter) indicator LED will illuminate; after a few seconds the red LIMIT indicator will extinguish.

LED POWER Indicator

The blue LED POWER indicator will illuminate when the AC Power switch is in the “ON” position, the AC mains power cord is connected properly, and the AC mains are functioning properly. The LED POWER indicator will extinguish when the AC Power switch is in the “off” position or AC mains power has been removed from the loudspeaker.

If the POWER indicator does not illuminate when the Power switch is placed in the “on” position, verify the AC mains line cord is properly attached to the loudspeaker and plugged into the AC outlet. Verify the outlet is functioning properly.

If the AC mains cordset is serviceable and the AC mains outlet is oper- ating properly, but the loudspeaker fails to operate, the loudspeaker may require servicing. Contact QSC’s Technical Services department.

System Power Sequencing

Proper power turn on sequence can help to prevent unexpected sounds from your system (pops, clicks, thumps). These unintended sounds can damage drivers and cause audience members to question the professionalism of the sound team. Turn on and off the system in the proper order to avoid unex- pected sounds.

Power On Sequence: Turn on all source devices (CD players, mixers), turn on subwoofer, then turn on the “top-boxes” (HPR122i, HPR152i and HPR153i).

Power Off Sequence: Turn off the top-boxes, turn off the subwoofer, then turn off the source devices.

AC power cord tether use-

1- Insert tether through chassis lance adjacent IEC inlet.

2- Form a small loop in the AC power cord. Cap- ture the AC power cord in the tether and secure by pull- ing the smaller end through the hole in the tether’s large end.

AC power switch

Power “on” indicator LED

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QSC Audio HPR122i, HPR152i, HPR153i, HPR151i, HPR181i AC Mains Disconnection, Power Switch, LED Power Indicator
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HPR122i, HPR152i, HPR153i, HPR151i, HPR181i specifications

QSC Audio is renowned for delivering high-quality audio solutions, and their HPR series is a testament to this commitment. The HPR122i, HPR152i, HPR153i, HPR151i, and HPR181i are standout models in the lineup, catering to a variety of sound reinforcement needs.

Starting with the HPR122i, this model is a 12-inch two-way loudspeaker designed for portable applications. It features a built-in 1000-watt Class D power amplifier, delivering exceptional clarity and high output. The rugged birch plywood enclosure enhances durability, while the advanced waveguide technology ensures a wide dispersion pattern, making it ideal for both live sound and permanent installations.

Moving up, the HPR152i showcases a larger 15-inch woofer, perfect for larger venues where deep bass and punchy sound are required. It retains the same robust build quality and integrated amplification as its smaller counterpart, ensuring reliability during extended use. The HPR152i’s contoured design allows for versatile positioning, whether it's on stands or as a floor monitor.

The HPR153i takes it a step further, offering a three-way design for even greater fidelity. With a dedicated 15-inch woofer, a 6.5-inch midrange, and a 1-inch compression driver, the HPR153i delivers a rich and detailed sound across all frequencies. This model is especially favored in settings where clarity and precision are paramount, such as concert halls and theatres.

Not to be overlooked, the HPR151i is a powerful subwoofer that complements the full-range speakers in the HPR series. Its 15-inch driver, paired with a 1000-watt Class D amplifier, delivers deep, impactful bass, enhancing the overall sonic experience. The HPR151i is ideal for situations requiring enhanced low-frequency response, making it a great match for DJs and live performers.

Finally, the HPR181i subwoofer elevates the low-end even further with its 18-inch woofer. This model is designed for serious bass enthusiasts, providing thunderous lows that can fill large spaces. Its robust design and advanced thermal management allow for extended use without overheating.

All models in the HPR series incorporate QSC’s Digital Signal Processing (DSP) technology, ensuring optimal sound performance and system protection. With their rugged construction, advanced features, and powerful sound, the QSC HPR series stands out as a top choice for audio professionals seeking reliability and exceptional performance in live sound applications. Whether for music, speech, or multimedia, the HPR series effectively meets the demands of diverse sound environments.
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